28170401 has 8 divisors (see below), whose sum is σ = 32802624. Its totient is φ = 23690160.

The previous prime is 28170367. The next prime is 28170419. The reversal of 28170401 is 10407182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28170401 - 2¹⁰ = 28169377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28170421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37595 + ... + 38336.

It is an arithmetic number, because the mean of its divisors is an integer number (4100328).

Almost surely, 2^28170401 is an apocalyptic number.

It is an amenable number.

28170401 is a deficient number, since it is larger than the sum of its proper divisors (4632223).

28170401 is an equidigital number, since it uses as much as digits as its factorization.

28170401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75991.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 28170401 is about 5307.5795801853. The cubic root of 28170401 is about 304.2736491712.

Adding to 28170401 its reverse (10407182), we get a palindrome (38577583).

The spelling of 28170401 in words is "twenty-eight million, one hundred seventy thousand, four hundred one".